1 // SPDX-License-Identifier: GPL-2.0
7  *  (C) 1991  Linus Torvalds - minix filesystem
17 int isofs_name_translate(struct iso_directory_record *de, char *new, struct inode *inode)  in isofs_name_translate()  argument
19 	char * old = de->name;  in isofs_name_translate()
20 	int len = de->name_len[0];  in isofs_name_translate()
32 		if (c == '.' && i == len - 3 && old[i + 1] == ';' && old[i + 2] == '1')  in isofs_name_translate()
36 		if (c == ';' && i == len - 2 && old[i + 1] == '1')  in isofs_name_translate()
40 		/* Also '/' to '.' (broken Acorn-generated ISO9660 images) */  in isofs_name_translate()
50 int get_acorn_filename(struct iso_directory_record *de,  in get_acorn_filename()  argument
55 	int retnamlen = isofs_name_translate(de, retname, inode);  in get_acorn_filename()
59 	std = sizeof(struct iso_directory_record) + de->name_len[0];  in get_acorn_filename()
62 	if (de->length[0] - std != 32)  in get_acorn_filename()
64 	chr = ((unsigned char *) de) + std;  in get_acorn_filename()
69 	if (((de->flags[0] & 2) == 0) && (chr[13] == 0xff)  in get_acorn_filename()
80  * This should _really_ be cleaned up some day..
95 	struct iso_directory_record *de;  in do_isofs_readdir()  local
96 	struct isofs_sb_info *sbi = ISOFS_SB(inode->i_sb);  in do_isofs_readdir()
98 	offset = ctx->pos & (bufsize - 1);  in do_isofs_readdir()
99 	block = ctx->pos >> bufbits;  in do_isofs_readdir()
101 	while (ctx->pos < inode->i_size) {  in do_isofs_readdir()
110 		de = (struct iso_directory_record *) (bh->b_data + offset);  in do_isofs_readdir()
112 		de_len = *(unsigned char *)de;  in do_isofs_readdir()
123 			ctx->pos = (ctx->pos + ISOFS_BLOCK_SIZE) & ~(ISOFS_BLOCK_SIZE - 1);  in do_isofs_readdir()
124 			block = ctx->pos >> bufbits;  in do_isofs_readdir()
135 			int slop = bufsize - offset + de_len;  in do_isofs_readdir()
136 			memcpy(tmpde, de, slop);  in do_isofs_readdir()
137 			offset &= bufsize - 1;  in do_isofs_readdir()
145 				memcpy((void *) tmpde + slop, bh->b_data, offset);  in do_isofs_readdir()
147 			de = tmpde;  in do_isofs_readdir()
150 		if (de_len < de->name_len[0] +  in do_isofs_readdir()
154 			       inode->i_ino);  in do_isofs_readdir()
156 			return -EIO;  in do_isofs_readdir()
160 			isofs_normalize_block_and_offset(de,  in do_isofs_readdir()
167 		if (de->flags[-sbi->s_high_sierra] & 0x80) {  in do_isofs_readdir()
169 			ctx->pos += de_len;  in do_isofs_readdir()
175 		if (de->name_len[0] == 1 && de->name[0] == 0) {  in do_isofs_readdir()
178 			ctx->pos += de_len;  in do_isofs_readdir()
185 		if (de->name_len[0] == 1 && de->name[0] == 1) {  in do_isofs_readdir()
188 			ctx->pos += de_len;  in do_isofs_readdir()
199 		if ((sbi->s_hide && (de->flags[-sbi->s_high_sierra] & 1)) ||  in do_isofs_readdir()
200 		    (!sbi->s_showassoc &&  in do_isofs_readdir()
201 				(de->flags[-sbi->s_high_sierra] & 4))) {  in do_isofs_readdir()
202 			ctx->pos += de_len;  in do_isofs_readdir()
207 		if (sbi->s_rock) {  in do_isofs_readdir()
208 			len = get_rock_ridge_filename(de, tmpname, inode);  in do_isofs_readdir()
209 			if (len != 0) {		/* may be -1 */  in do_isofs_readdir()
216 			if (sbi->s_joliet_level) {  in do_isofs_readdir()
217 				len = get_joliet_filename(de, tmpname, inode);  in do_isofs_readdir()
221 			if (sbi->s_mapping == 'a') {  in do_isofs_readdir()
222 				len = get_acorn_filename(de, tmpname, inode);  in do_isofs_readdir()
225 			if (sbi->s_mapping == 'n') {  in do_isofs_readdir()
226 				len = isofs_name_translate(de, tmpname, inode);  in do_isofs_readdir()
229 				p = de->name;  in do_isofs_readdir()
230 				len = de->name_len[0];  in do_isofs_readdir()
237 		ctx->pos += de_len;  in do_isofs_readdir()
258 		return -ENOMEM;  in isofs_readdir()